A decrease in the level of estrogen-progesterone causes

Growth and dilation of myometrium

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Growth of endometrium

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Constriction of uterine blood vessels leading to shedding of endometrium or uterine epithelium

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Release of ovum from the ovary

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Solution

The correct option is B Constriction of uterine blood vessels leading to shedding of endometrium or uterine epithelium
Menstruation is the shedding of the lining of the uterus (endometrium) accompanied by bleeding. Bleeding occurs after oestrogen and progesterone levels decrease at the end of the previous cycle. This decrease causes the top layers of thickened lining of the uterus (endometrium) to break down and be shed.

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Similar questions

Column I	Column II
(a) FSH	(i) Prepare endometrium for implantation
(b) LH	(ii) Develop female secondary sexual characters
(c) Progesterone	(iii) Contraction of uterine wall
(d) Estrogen	(iv) Development of corpus luteum
	(v) Maturation of Graafian follicle

Give appropriate terms for each of the following :

(a) The onset of reproductive phase in a female.

(b) Rupture of follicle and release of ovum from the ovary.

(d) Process of fusion of ovum and sperm.

(e) Fixing of developing zygote (blastocyst) on the uterine wall.

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